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Did you know?

The immune system needs 9.5 hours of sleep in total darkness to recharge completely.

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Cocaine was isolated in 1860 and first used as a local anesthetic in 1884. Its first clinical use was by Sigmund Freud to wean a patient from morphine addiction. The fictional character Sherlock Holmes was supposed to be addicted to cocaine by injection.

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Hyperthyroidism leads to an increased rate of metabolism and affects about 1% of women but only 0.1% of men. For most people, this increased metabolic rate causes the thyroid gland to become enlarged (known as a goiter).

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More than 34,000 trademarked medication names and more than 10,000 generic medication names are in use in the United States.

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Nearly 31 million adults in America have a total cholesterol level that is more than 240 mg per dL.

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The secular trend in growth as measured in Swedish (a) girls and (b) boys between 1883 and 1968. The secular trend in growth as measured in Swedish (a) girls and (b) boys between 1883 and 1968.
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Video: Protein catabolism - deamination

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